142861861 has 2 divisors, whose sum is σ = 142861862. Its totient is φ = 142861860.

The previous prime is 142861793. The next prime is 142861877. The reversal of 142861861 is 168168241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93721761 + 49140100 = 9681^2 + 7010^2 .

It is a cyclic number.

It is not a de Polignac number, because 142861861 - 2¹¹ = 142859813 is a prime.

It is a super-2 number, since 2×142861861² = 40819022656766642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142861861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142861561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71430930 + 71430931.

It is an arithmetic number, because the mean of its divisors is an integer number (71430931).

Almost surely, 2^142861861 is an apocalyptic number.

It is an amenable number.

142861861 is a deficient number, since it is larger than the sum of its proper divisors (1).

142861861 is an equidigital number, since it uses as much as digits as its factorization.

142861861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 37.

The square root of 142861861 is about 11952.4834657907. The cubic root of 142861861 is about 522.7637135537.

The spelling of 142861861 in words is "one hundred forty-two million, eight hundred sixty-one thousand, eight hundred sixty-one".